Balancing equations
a) Mg + HCl --> MgCl2 + H2
b) K + H2O --> KOH + H2
c) Li + H2O --> LiOH + H2
d) Fe + O2 --> Fe2O3
Please help
Sure! I can help you balance the given chemical equations. Balancing equations involves making sure that there are an equal number of atoms of each element on both sides of the equation.
a) Mg + HCl --> MgCl2 + H2
To balance this equation, you need to make sure that there is an equal number of Mg, Cl, and H on both sides.
First, let's look at the Mg atoms. There is one Mg on the left side and one Mg on the right side, so it is already balanced.
Next, let's look at the Cl atoms. There is one Cl on the left side and two Cl on the right side (in MgCl2). To balance the Cl atoms, you need to put a coefficient of 2 in front of HCl like this:
Mg + 2HCl --> MgCl2 + H2
Finally, let's look at the H atoms. There are two H on the left side and two H on the right side, so it is already balanced.
Therefore, the balanced equation is: Mg + 2HCl --> MgCl2 + H2
b) K + H2O --> KOH + H2
To balance this equation, you need to make sure that there is an equal number of K, O, and H on both sides.
First, let's look at the K atoms. There is one K on the left side and one K on the right side, so it is already balanced.
Next, let's look at the O atoms. There is one O on the left side and one O on the right side (in KOH). It is already balanced.
Finally, let's look at the H atoms. There are two H on the right side (in H2O) and two H on the right side (in KOH). It is already balanced.
Therefore, the balanced equation is: K + H2O --> KOH + H2
c) Li + H2O --> LiOH + H2
To balance this equation, you need to make sure that there is an equal number of Li, O, and H on both sides.
First, let's look at the Li atoms. There is one Li on the left side and one Li on the right side, so it is already balanced.
Next, let's look at the O atoms. There is one O on the left side and one O on the right side (in LiOH). It is already balanced.
Finally, let's look at the H atoms. There are two H on the right side (in H2O) and one H on the right side (in LiOH). To balance the H atoms, you need to put a coefficient of 2 in front of LiOH like this:
Li + H2O --> 2LiOH + H2
Therefore, the balanced equation is: Li + H2O --> 2LiOH + H2
d) Fe + O2 --> Fe2O3
To balance this equation, you need to make sure that there is an equal number of Fe and O on both sides.
First, let's look at the Fe atoms. There is one Fe on the left side and two Fe on the right side (in Fe2O3). To balance the Fe atoms, you need to put a coefficient of 2 in front of Fe like this:
2Fe + O2 --> Fe2O3
Next, let's look at the O atoms. There is two O on the left side (in O2) and three O on the right side (in Fe2O3). To balance the O atoms, you need to put a coefficient of 3 in front of O2 like this:
2Fe + 3O2 --> Fe2O3
Therefore, the balanced equation is: 2Fe + 3O2 --> Fe2O3
I hope this helps! Let me know if you have any more questions.